Not necessarily. Most apps should build in reproducible way these days. That means you can compile the same versions and likely get the same offsets. (+/- custom options applied to your local system)
So, if the offsets were in fact different, would the explots still work? (I think the answer is actually yes based on what I read/saw; I think the PoC dynamically calculates these offsets? Not 100% sure, but we shouldn't take chances.)